Proceedings of International Conference on Perovskite Thin Film Photovoltaics, Photonics and Optoelectronics (ABXPV18PEROPTO)
DOI: https://doi.org/10.29363/nanoge.abxpvperopto.2018.019
Publication date: 11th December 2017
High-speed photodetectors are in high demand in many fields including imaging, optical communications, chemical species detection, and other types of optical instrumentation. Mostly, these photodetectors use silicon or semiconductor alloys to build devices that require costly fabrication methods. Recently, organometal halide perovskites have demonstrated outstanding optoelectronic properties such as tunable optical properties, high charge mobility, and long charge diffusion length. In the work, we report a stable, reproducible and reliable pseudohalide perovskite nanowire network based photodetector with superior photodetection performance. The perovskite nanowire networks are deposited onto micropatterned substrates under ambient conditions of relative humidity (RH), higher than 50 % through a two-step spin coating method. Because of the 1D perovskite structure, our devices require no charge extractors which is advantageous for low-cost fabrication and processing simplicity. The photoresponse measurements indicate broad spectral response from 300 to 850 nm, high spectral responsivity, time response and photocurrent. This results indicate that photocurrent generation is due to the charge transfer within the nanowire networks and present a simple, fast and low-cost solution fabrication technique of perovskite nanowire-based photodetectors in ambient air.
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